Basically a Mario-clone
As a game goes, I really didn't see anything original other than the artwork. That's not to say this is a bad game, just that it's been done. The only issues that I had with it were that the music was a little annoying and the graphics a little choppy. I'd have to check on my Win7 system to see if the graphics thing was a real issue or not, as it happens sometimes on my Linux system no matter how well the game is done.
If I had to make some suggestions to improve the game, I would say that an introductory story - even a poor one - goes a long way toward adding flavor to a game. I think it would help. Adding a volume/mute button for the music would be a welcome feature, and an instructions page (despite the simplicity of the gameplay) would also be appreciated. You could use the instructions page to set up some background too, if you like.
Hope that helps.